Interchangeable revolving electric shaver head



3,106,775 INTERCHANGEABLE REVOLVING ELECTRIC SHAVER HEAD Filed March 30, 1962 R. B. LEW

Oct. 15, 1963 2 Sheets-Sheet 1 INVENTOR. ROBERT B. LEW

ATTOP/VKY R. B. LEW 7 3,106,775 INTERCHANGEABLE REVOLVING ELECTRIC SHAVER HEAD I Oct. 15,1963

2 Sheets-Sheet 2 Filed March 50 1962 INVENTOR.

ROBERT B- LEW United States Patent 3,106,775 INTERCHANGEABLE REVOLVlNfl ELECTRIC SHAVER HEAD Robert B. Lew, 2160 Park Ave, Miami Beach 39, Fla. Filed Mar. 30, 1962, Ser. No. 183,947 2 Claims. (CI. 30-43) This invention concerns a new and improved electric shaver.

According to the invention there is provided a motor driven appliance which has a perforated head shaped to fit various portions of the face and body, with a rotatable cutter blade rotor assembly disposedin the head. Both cutter blade assembly and head are removable from the shaver for replacement by other forms of head and blade assembly.

One object of the invention is to provide an electric shaver adapted to cut hairs provided with a head having perforations extending all around the head, the rotary cutter blade assembly therein rotating through 360 so as to be effective in cutting hairs in all positions of the blades.

Another object is to provide an electric shaver with replaceable heads adapted for cutting hairs on the face, under arms, in nose and ears, etc.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

FIG. 1 is a side elevational View of one electric shaver embodying the invention, parts being broken away.

FIG. 2 is a vertical cross-sectional view through the head of the shaver taken on line 2-2 of FIG. 1, parts being broken away.

FIG. 3 is a vertical longitudinal sectional view through the shaver taken on line 3-3 of FIG. 2.

FIG. 4 is a side elevational View of another electric shaver according to the invention, parts being broken away.

FIG. 5 is an exploded side elevational view of the shaver of FIG. 4, parts being broken away.

FIG. 6 is a side elevational view of still another electric shaver, parts being broken away.

FIG. 7 is a side elevational View of a rotary blade cutter employed in the shaver of FIG. 6.

FIG. 8 is a side elevational view, partly in section, of another modification of the invention. v

Referring to FIGS. 1, 2 and 3, there is shown a shaver 19 including a hand grip portion 12 provided with a cavity 14 in which is disposed a cylindrical motor 16. The motor is energized via a cable or cord 18 terminating in a plug 20. The cable passes through a passage 22 formed in the body of the hand grip. The motor has a drive shaft 24 formed with a cavity 26 in which can be removably seated one end of the shaft 27 of a rotary cutter blade assembly 30.

The blade assembly 39 includes the cylindrical shaft 27 in which is seated a plurality of radial stems 32. At the ends of the stems are secured hardened steel cutter blades 34. The stems are disposed in planes perpendicular to the axis of the shaft 27 and are equally spaced around the shaft, preferably 120 apart. The other end of shaft 27 is removably journaled in a recess 0r bearing seat 36 formed in the circular end 38 of a cylindrical shell-like head 40. The cylindrical wall of the head is formed with a multiplicity of fine slits 42 disposed in a randomly placed array all around the head. The blades 34 slide along the inner surface of the head and cut all hairs Patented Oct. 15, 1963 which project through the slits. The free open end of the head fits snuglyon a recessed annular shoulder 43 formed in the shank 44 of the hand grip.

To demount the head it is only necessary to pull it axially away from the hand grip. This will free the head from the cutter blade assembly which can then be pulled free of the motor shaft 24. In this form of the invention, the shaver is especially adapted for shaving flat or substantially flat surfaces such as sides of checks, neck surfaces and the like.

The shaver 10 shown in FIGS. 4 and 5 is better adapted for shaving surfaces having compound concave curvature such as under arms. The head 4-!) of shaver 10 is a hollow shell with a rounded end formed with a bearing seat 36 to receive one end of shaft 27 while the other end 29 of the shaft seats in recess 26 of the motor shaft 24. Head 40 is provided with slits 42 disposed in a random pattern. The radial stems 32 of the rotary cutter blade assembly 30 have different lengths to correspond to the varying inner contour of the compound curved head 40 The blades 34 slide along the inner surface of the head just as do blades 34 in head 40. The stems are located in planes perpendicular to shaft 27 and are equally spaced in these planes. End 29 of the shaft 27 may be splined as indicated in FIG. 5 to connect more securely with the motor shaft. The blades are preferably connected to each other by means of short wires 45 connected at their ends to pins 46 extending through lugs 48 depending from the ends of the blades. Upon rotation of the stems 32 supporting the wires and blades, the wires 45 coact with the blades under centrifugal force to keep the respective blades in alignment with each other and ensure that the blades movev over the slits 42 in the head 40*.

In the form of the invention shown in FIGS. 6 and 7, shaver 10* has a shell-like head 40* provided with perforations or slits 42 in its closed conical portion 50 and cylindrical portion 52. This handle fits on the shoulder 43 of head 12 in the same manner as heads 40 and 40 The rotary cutter blade assembly 36 provided for the shaver 10 is shown in FIG. 7. It includes a shaft 27 whose splined end 29 fits into the seat in motor shaft 24. The other end 25 of the shaft 27 is formed as a fine pintle which rotates in a fine seat formed at the apex of the conical portion 50 of the head.

Resilient springs 35 are secured to the shaft 27 and extend radially outward therefrom. Blades 51 are secured to the free ends of the end springs 35 and are parallel to the axis of the shaft. Inclined blades 55 on springs 35 are inclined to the axis of the shaft and taper to an apex near the pintle end 25* of the shaft.

Blades 51 slide around the inner surface of cylindrical portion 52 while blades 55 slide around the inner surface of conical portion 50. Adjacent blades 51 and adjacent blades 55 are connected together by wires 45 pins 46 and lugs 48 for the same purpose as in the form of FIGS. 4 and 5. This form of shaver head is especially adapted to fit into fine interstices'for cutting hairs in cars, nose, and the like.

There is thus provided, according to the invention, a

shaver which has a basic hand grip and motor adapted to receive interchangeable shell-like heads and correspondingly shaped rotary cutter blade assemblies for doing different hair cutting tasks efficiently.

Referring now to the modification of the invention shown in FIG. 8, this form. comprises a hollow hand grip portion 12 housing .the motor. The motor shaft 24 is formed with a square-shaped socket 26'. A massaging device 54 (is removably mounted on the motor housing for rotation with the shaft 24. The massaging device is for massaging the skin and comprises a discshaped body 56 with a central recess 58 and a solid hub portion 6%} formed with a central recess 62. The body 56 is formed of rubber or soft plastic. A stem 64 depends from the roof of the recess and re-rnovably fits in the socket 26' in the motor shaft. The disc-shaped body is pressed against the body of the user in use for massaging the body.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and that various changes and modifications may be made within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent 1. An electric shaver, comprising a hand grip, a motor mounted in the hand grip, a shell-like head removably mounted on the hand grip, a rotary cutter blade assern bly disposed in the head, said motor having a shaft projecting into the head, said blade assembly having a shaft detachably connected to the motor shaft and rotatable thereby, said assembly having blades rotatable in contact with the inner side of the head, said head being perforated for admission of hairs into the head to be cut by said blades during rotation thereof, the inner side of the head being formed with a bearing seat for rotatably supporting one end of the shaft of the blade assembly, the blades being secured on spaced individual springs extending from the shaft of the blade assembly at a slant to the axis of the shaft, said head being a generally cylindrical member with a perforated conical end for receiving hair adapted to be shaved off by said blades.

2. The electric shaver a defined in claim 1, and short wires connecting the blades to keep the blades in alignment with each other.

References Cited in the file of this patent UNITED STATES PATENTS 1,211,273 Ard Ian. 2, 1917 2,232,474 Rauh Feb. 18, 1941 2,243,441 Russell May 27, 1941 2,246,459 Bahr June 17, 1941 2,265,281 Hale Dec. 9, 1941 2,315,274 Rand Mar. 30, 1943 2,500,378 Quackenbush et al Mar. 14, 1950 2,500,578 Sawyer et a1. Mar. 14, 1950 2,727,303 Marley Dec. 20, 1955 2,867,038 Brueclcer Jan. 6, 1959 2,946,121 Marach July 26, 1960 3,031,755 Hertsber-g May 1, 1962 FOREIGN PATENTS 232,705 Switzerland Mar. 10. 1944 507,127 Italy Dec. 28, 1954 509,820 Italy Jan. 18, 1955 585,231 Italy Nov. 18, 1958 810,971 Germany Aug. 16, 1951 53,896 Holland Ian. 16, 1943 452,936 Canada Nov. 30, 1948 

1. AN ELECTRIC SHAVER, COMPRISING A HAND GRIP, A MOTOR MOUNTED IN THE HAND GRIP, A SHELL-LIKE HEAD REMOVABLY MOUNTED ON THE HAND GRIP, A ROTARY CUTTER BLADE ASSEMBLY DISPOSED IN THE HEAD, SAID MOTOR HAVING A SHAFT PROJECTING INTO THE HEAD, SAID BLADE ASSEMBLY HAVING A SHAFT DETACHABLY CONNECTED TO THE MOTOR SHAFT AND ROTATABLE THEREBY, SAID ASSEMBLY HAVING BLADES ROTATABLE IN CONTACT WITH THE INNER SIDE OF THE HEAD, SAID HEAD BEING PERFORATED FOR ADMISSION OF HAIRS INTO THE HEAD TO BE CUT BY SAID BLADES DURING ROTATION THEREOF, THE INNER SIDE OF THE HEAD BEING FORMED WITH A BEARING SEAT FOR ROTATABLY SUPPORTING ONE END OF THE SHAFT OF THE BLADE ASSEMBLY, THE BLADES BEING SECURED ON SPACED INDIVIDUAL SPRINGS EXTENDING FROM THE SHAFT OF THE BLADE ASSEMBLY AT A SLANT TO THE AXIS OF THE SHAFT, SAID HEAD BEING A GENERALLY CYLINDRICAL MEMBER WITH A PERFORATED CONICAL END FOR RECEIVING HAIR ADAPTED TO BE SHAVED OFF BY SAID BLADES. 